What is the function of trap flag in 8086 microprocessor?

Replies

• 

  swati verma

  Trap flag when set then single step interrupt will occur after the next instruction.
• 

  Trieu Vi Nguyen

  how to enable Trap flag? which instruction can do that?
• 

  rahul69

  #-Link-Snipped-# There is no specific instruction to set Trap flag. However, u can set it by changing the Trap Flag Bit of the flags register.
  Also, The Trap Flag is mainly used for debugging purposes.
  Hope it helps!!!
• 

  simplycoder

  Trap Flag
  
  amazingly explained.
• 

  Ankita Katdare

  More amazingly, this thread has thousands of views. It only goes to say engineers are searching for the basics and CE is providing them the answers. 👍
  
  So, here's my two cents:
  Trap Flag is used for on-chip debugging. Debuggers can use it for step-by-step execution of a computer program. If 8086 does a type-1 interrupt, Trap Flag is reset. Therefore, the single-step mode will be disabled during the interrupt-service procedure.
• 

  Shanu Verma

  will any geek tell me what the hell on earth single step execution means ?